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If f'(x)=ϕ(x) and ϕ'(x)=f(x) for all x. Also f(3)=5 and f'(3)=4. Then the value of [f(10)]2−[ϕ(10)]2 is .

Answer» If f'(x)=ϕ(x) and ϕ'(x)=f(x) for all x. Also f(3)=5 and f'(3)=4. Then the value of [f(10)]2[ϕ(10)]2 is .


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