If `b_(yx)` is negative then what will be `b_(xy)` ?

If 3b+8gt6+2b , and b is a negative integer, what is the value of b?

Assertion : Two concentric spherical shells A and B are charged by charges q_(A) and q_(B) . If q_(A) is negative, then V_(A)-V_(B) is also negative. Reason : V_(A)-V_(B) =(q_(A)/(4pi epsi_(0)))(1/R_(A)-1/r_(B)) therefore, if q_(A) is negative, then V_(A)-V_(B) is also negative.

If an object made of substance A is rubbed with an object made of substance B, then A becomes positively charged and B becomes negatively charged. If however, an object made of substance C, then A becomes negatively charged, What will happen if an object made of substance B is rubbed against an object made of substance C? (a) B becomes positively charged and C becomes positively (b) B becomes positively charged and C becomes negatively charged. (c ) B becones negatively charged and C becomes positively charged. (d) B becomes negatively charged and C becomes negatively charged.

The sign of a is positive. The sign of b is negative. If it can be determined, what is the sign of the mean of a and b?

Let a, b be integers such that all the roots of the equation ( x^2 + ax + 20)(x^2 + 17x + b) = 0 are negative integers. What is the smallest possible value of a + b ?

If the regression coefficients b_(xy)=1.6 and b_(yx)=0.4 , and theta is the angle between the two lines of regression, then the value of tantheta is

If a and b are two negative integers such that a lt b " then " (1)/(a) gt (1)/(b) .

If the line of regression of x on y is 3x + 2y - 5 = 0 , then the value of b_(xy) is

If xy = ae^(x) + be^(-x) satisfies the equation Axy'' +By' = xy , then |A-B| is__________.

Show that if a and b are real, the principal value of arg a is 0 or π according as a is positive or negative and that of bi is pi/2 or -pi/2 according as b is positive or negative.