z=2+3i and f(z)=z+2z+7z then f(z)=?
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f'(z)= 10
but did you asked f(z) or f'(z)..
if f(z) then answer is ....
f(z)=20+30i.
but did you asked f(z) or f'(z)..
if f(z) then answer is ....
f(z)=20+30i.
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fz=z+2z+7z
put value of z ie z=2+3i
therefore , fz= z+2z+7z
=2+3i+2 (2+3i)+7 (2+3i)
=2+3i+4+6i+14+21i
=20+30i
put value of z ie z=2+3i
therefore , fz= z+2z+7z
=2+3i+2 (2+3i)+7 (2+3i)
=2+3i+4+6i+14+21i
=20+30i
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