Which of the following is always true ?

Which is the following is always true ? (a) If a lt b, " then " a^2 lt b^2 (b ) If a lt b "then " 1/a gt 1/b ( c) If a lt b , " then " |a| lt |b|

Which is the following is always true ? (a) If a lt b, " then " a^2 lt b^2 (b ) If a lt b "then " 1/a gt 1/b ( c) If a lt b , " then " |a| lt |b|

Which is the following is always true ? (a) If a lt b, " then " a^2 lt b^2 (b ) If a lt b "then " 1/a gt 1/b ( c) If a lt b , " then " |a| lt |b|

f(x) is continuous at x = 0 then which of the following are always true ?

f(x) is continuous at x = 0 then which of the following are always true ?

f(x) is continuous at x = 0 then which of the following are always true ?

Let f : [-3, 4] to R such that f ''(x) gt 0 for all x in [-3,4], then which of the following are always true ?

Let f : [-3, 4] to R such that f ''(x) gt 0 for all x in [-3,4], then which of the following are always true ?

If one root of the quadratic equation x^(2)+ax+b=0 is square of the other root,then which of the following always true?