low many real solution does the equation x?+ 14x5 +16x3 + 30x - 560 = 0 have? [AIE A) 1 (B)3 (D) 7 (C) 5 [30

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Civen [ x^{7}+14 x^{5}+16 x^{3}+30 x-560=0 ] ( f^{prime}(n)=7 x^{6}+70 x^{4}+48 x^{2}+30 x>0 ) fence ( quad 70 ) (n) is monotonic tunction ( _{2} ) it cuts ( x ) anis only once ( therefore ) If has one real solution

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