% (i) Find f(1.2) in the form ‘a x 10^n’ where a is correct to 1 decimal place
% (ii) Find x for which g(x) = 3.5
% (iii) Find g(f(x)) in simplest form

clear, clc

syms x

f = exp(9*x); g = log(sqrt(x));

% (i)

f_at_x = subs(f,x,1.2); % evaluates f(x = 1.2) as symbolic
f_at_x = double(f_at_x); % converts to double (real)
f_at_x = round(f_at_x,1) % ??? round to 1 decimal place

% (ii)

solve (g == 3.5, x)

% (iii)

g_f_x = (subs(g,x,f));
g_f_x = simplify(g_f_x)% (i) Find f(1.2) in the form ‘a x 10^n’ where a is correct to 1 decimal place
% (ii) Find x for which g(x) = 3.5
% (iii) Find g(f(x)) in simplest form

clear, clc

syms x

f = exp(9*x); g = log(sqrt(x));

% (i)

f_at_x = subs(f,x,1.2); % evaluates f(x = 1.2) as symbolic
f_at_x = double(f_at_x); % converts to double (real)
f_at_x = round(f_at_x,1) % ??? round to 1 decimal place

% (ii)

solve (g == 3.5, x)

% (iii)

g_f_x = (subs(g,x,f));
g_f_x = simplify(g_f_x) % (i) Find f(1.2) in the form ‘a x 10^n’ where a is correct to 1 decimal place
% (ii) Find x for which g(x) = 3.5
% (iii) Find g(f(x)) in simplest form

clear, clc

syms x

f = exp(9*x); g = log(sqrt(x));

% (i)

f_at_x = subs(f,x,1.2); % evaluates f(x = 1.2) as symbolic
f_at_x = double(f_at_x); % converts to double (real)
f_at_x = round(f_at_x,1) % ??? round to 1 decimal place

% (ii)

solve (g == 3.5, x)

% (iii)

g_f_x = (subs(g,x,f));
g_f_x = simplify(g_f_x) simplifying symbolic, rounding decimals MATLAB Answers — New Questions

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