If f(x) is continuous function for all x∈R and range of f(x) is (2, 26) and g(x)=f(x)c is continuous ∀ x∈R , then the least positive integral value of c is (where [ ] is greatest integer function)
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a
2
b
3
c
5
d
6
answer is D.
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Detailed Solution
∴20 2c>f(x)c>26c if c<0 if 026g(x)=f(x)c=0 is continuous ∀x∈R when c>26if -26
If f(x) is continuous function for all x∈R and range of f(x) is (2, 26) and g(x)=f(x)c is continuous ∀ x∈R , then the least positive integral value of c is (where [ ] is greatest integer function)