Vaishnavi mishra Asked a Question
September 23, 2021 11:40 ampts 20 pts
Let f: R R be a function defined by f(x) = x7+5x3 +11x 15, Then, which of the following statements is TRUE? (A) fis both one-one and onto (B) fis neither one-one nor onto (C) f is one-one but NOT onto (D) fis onto but NOT one-one
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  • Navdeep 1
    check curve which is monotoncally increasing so f is one one onto
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  • Sai
    Both One-onr and onto
    • cropped3480286504467033618.jpg
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  • Navdeep 1 thankyou
    f’(x)=7x6+15x²+11> 0 for all x elements of R so f(x) is increasing function hence f is one one onto options (A)
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    Navdeep 1
    check attachment
    • cropped8667138834360279988.jpg
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